X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/bbc1cfa669a5f51ed26bae3784447076e3fbc80f..309ca62193772fd8ba532fd413b51a61be0c741e:/print-udp.c?ds=inline

diff --git a/print-udp.c b/print-udp.c
index 69ef39d5..885d42e4 100644
--- a/print-udp.c
+++ b/print-udp.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.126 2003-11-16 09:36:41 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.142 2007-08-08 17:20:58 hannes Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -33,9 +33,6 @@ static const char rcsid[] _U_ =
 #ifdef SEGSIZE
 #undef SEGSIZE
 #endif
-#include <arpa/tftp.h>
-
-#include <rpc/rpc.h>
 
 #include <stdio.h>
 #include <string.h>
@@ -52,6 +49,8 @@ static const char rcsid[] _U_ =
 #include "ip6.h"
 #endif
 #include "ipproto.h"
+#include "rpc_auth.h"
+#include "rpc_msg.h"
 
 #include "nameser.h"
 #include "nfs.h"
@@ -285,80 +284,18 @@ rtcp_print(const u_char *hdr, const u_char *ep)
 
 static int udp_cksum(register const struct ip *ip,
 		     register const struct udphdr *up,
-		     register int len)
+		     register u_int len)
 {
-	union phu {
-		struct phdr {
-			u_int32_t src;
-			u_int32_t dst;
-			u_char mbz;
-			u_char proto;
-			u_int16_t len;
-		} ph;
-		u_int16_t pa[6];
-	} phu;
-	register const u_int16_t *sp;
-
-	/* pseudo-header.. */
-	phu.ph.len = htons(len);
-	phu.ph.mbz = 0;
-	phu.ph.proto = IPPROTO_UDP;
-	memcpy(&phu.ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t));
-	if (IP_HL(ip) == 5)
-		memcpy(&phu.ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t));
-	else
-		phu.ph.dst = ip_finddst(ip);
-
-	sp = &phu.pa[0];
-	return in_cksum((u_short *)up, len,
-			sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5]);
+	return (nextproto4_cksum(ip, (const u_int8_t *)(void *)up, len,
+	    IPPROTO_UDP));
 }
 
 #ifdef INET6
 static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up,
-	int len)
+	u_int len)
 {
-	int i, tlen;
-	register const u_int16_t *sp;
-	u_int32_t sum;
-	union {
-		struct {
-			struct in6_addr ph_src;
-			struct in6_addr ph_dst;
-			u_int32_t	ph_len;
-			u_int8_t	ph_zero[3];
-			u_int8_t	ph_nxt;
-		} ph;
-		u_int16_t pa[20];
-	} phu;
-
-	tlen = EXTRACT_16BITS(&ip6->ip6_plen) + sizeof(struct ip6_hdr) -
-	    ((const char *)up - (const char*)ip6);
-
-	/* pseudo-header */
-	memset(&phu, 0, sizeof(phu));
-	phu.ph.ph_src = ip6->ip6_src;
-	phu.ph.ph_dst = ip6->ip6_dst;
-	phu.ph.ph_len = htonl(tlen);
-	phu.ph.ph_nxt = IPPROTO_UDP;
-
-	sum = 0;
-	for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++)
-		sum += phu.pa[i];
-
-	sp = (const u_int16_t *)up;
-
-	for (i = 0; i < (tlen & ~1); i += 2)
-		sum += *sp++;
-
-	if (tlen & 1)
-		sum += htons((*(const u_int8_t *)sp) << 8);
-
-	while (sum > 0xffff)
-		sum = (sum & 0xffff) + (sum >> 16);
-	sum = ~sum & 0xffff;
-
-	return (sum);
+	return (nextproto6_cksum(ip6, (const u_int8_t *)(void *)up, len,
+	    IPPROTO_UDP));
 }
 #endif
 
@@ -471,8 +408,8 @@ udp_print(register const u_char *bp, u_int length,
 		return;
 	}
 	if (packettype) {
-		register struct rpc_msg *rp;
-		enum msg_type direction;
+		register struct sunrpc_msg *rp;
+		enum sunrpc_msg_type direction;
 
 		switch (packettype) {
 
@@ -487,9 +424,9 @@ udp_print(register const u_char *bp, u_int length,
 			break;
 
 		case PT_RPC:
-			rp = (struct rpc_msg *)(up + 1);
-			direction = (enum msg_type)EXTRACT_32BITS(&rp->rm_direction);
-			if (direction == CALL)
+			rp = (struct sunrpc_msg *)(up + 1);
+			direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
+			if (direction == SUNRPC_CALL)
 				sunrpcrequest_print((u_char *)rp, length,
 				    (u_char *)ip);
 			else
@@ -529,7 +466,7 @@ udp_print(register const u_char *bp, u_int length,
 #ifdef INET6
 			    ip6 != NULL);
 #else
-			    FALSE);
+			    0);
 #endif
 			break;
 		}
@@ -537,24 +474,24 @@ udp_print(register const u_char *bp, u_int length,
 	}
 
 	if (!qflag) {
-		register struct rpc_msg *rp;
-		enum msg_type direction;
+		register struct sunrpc_msg *rp;
+		enum sunrpc_msg_type direction;
 
-		rp = (struct rpc_msg *)(up + 1);
+		rp = (struct sunrpc_msg *)(up + 1);
 		if (TTEST(rp->rm_direction)) {
-			direction = (enum msg_type)EXTRACT_32BITS(&rp->rm_direction);
-			if (dport == NFS_PORT && direction == CALL) {
+			direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
+			if (dport == NFS_PORT && direction == SUNRPC_CALL) {
 				nfsreq_print((u_char *)rp, length,
 				    (u_char *)ip);
 				return;
 			}
-			if (sport == NFS_PORT && direction == REPLY) {
+			if (sport == NFS_PORT && direction == SUNRPC_REPLY) {
 				nfsreply_print((u_char *)rp, length,
 				    (u_char *)ip);
 				return;
 			}
 #ifdef notdef
-			if (dport == SUNRPC_PORT && direction == CALL) {
+			if (dport == SUNRPC_PORT && direction == SUNRPC_CALL) {
 				sunrpcrequest_print((u_char *)rp, length, (u_char *)ip);
 				return;
 			}
@@ -571,31 +508,46 @@ udp_print(register const u_char *bp, u_int length,
 	}
 	udpipaddr_print(ip, sport, dport);
 
-	if (IP_V(ip) == 4 && vflag && !fragmented) {
-		int sum = up->uh_sum;
-		if (sum == 0) {
-			(void)printf("[no cksum] ");
-		} else if (TTEST2(cp[0], length)) {
-			sum = udp_cksum(ip, up, length + sizeof(struct udphdr));
-			if (sum != 0)
-				(void)printf("[bad udp cksum %x!] ", sum);
-			else
-				(void)printf("[udp sum ok] ");
+	if (vflag && !Kflag && !fragmented) {
+                /* Check the checksum, if possible. */
+                u_int16_t sum, udp_sum;
+
+		/*
+		 * XXX - do this even if vflag == 1?
+		 * TCP does, and we do so for UDP-over-IPv6.
+		 */
+	        if (IP_V(ip) == 4 && (vflag > 1)) {
+			udp_sum = EXTRACT_16BITS(&up->uh_sum);
+			if (udp_sum == 0) {
+				(void)printf("[no cksum] ");
+			} else if (TTEST2(cp[0], length)) {
+				sum = udp_cksum(ip, up, length + sizeof(struct udphdr));
+
+	                        if (sum != 0) {
+        	                        (void)printf("[bad udp cksum 0x%04x -> 0x%04x!] ",
+					    udp_sum,
+					    in_cksum_shouldbe(udp_sum, sum));
+				} else
+					(void)printf("[udp sum ok] ");
+			}
 		}
-	}
 #ifdef INET6
-	if (IP_V(ip) == 6 && ip6->ip6_plen && vflag && !fragmented) {
-		int sum = up->uh_sum;
-		/* for IPv6, UDP checksum is mandatory */
-		if (TTEST2(cp[0], length)) {
-			sum = udp6_cksum(ip6, up, length);
-			if (sum != 0)
-				(void)printf("[bad udp cksum %x!] ", sum);
-			else
-				(void)printf("[udp sum ok] ");
+		else if (IP_V(ip) == 6 && ip6->ip6_plen) {
+			/* for IPv6, UDP checksum is mandatory */
+			if (TTEST2(cp[0], length)) {
+				sum = udp6_cksum(ip6, up, length + sizeof(struct udphdr));
+				udp_sum = EXTRACT_16BITS(&up->uh_sum);
+
+	                        if (sum != 0) {
+        	                        (void)printf("[bad udp cksum 0x%04x -> 0x%04x!] ",
+					    udp_sum,
+					    in_cksum_shouldbe(udp_sum, sum));
+				} else
+					(void)printf("[udp sum ok] ");
+			}
 		}
-	}
 #endif
+	}
 
 	if (!qflag) {
 #define ISPORT(p) (dport == (p) || sport == (p))
@@ -616,13 +568,15 @@ udp_print(register const u_char *bp, u_int length,
 #ifdef INET6
 			    ip6 != NULL);
 #else
-			    FALSE);
+			    0);
 #endif
-		else if (ISPORT(ISAKMP_PORT))
-			isakmp_print((const u_char *)(up + 1), length, bp2);
+	        else if (ISPORT(ISAKMP_PORT))
+			 isakmp_print(gndo, (const u_char *)(up + 1), length, bp2);
+  	        else if (ISPORT(ISAKMP_PORT_NATT))
+			 isakmp_rfc3948_print(gndo, (const u_char *)(up + 1), length, bp2);
 #if 1 /*???*/
-		else if (ISPORT(ISAKMP_PORT_USER1) || ISPORT(ISAKMP_PORT_USER2))
-			isakmp_print((const u_char *)(up + 1), length, bp2);
+   	        else if (ISPORT(ISAKMP_PORT_USER1) || ISPORT(ISAKMP_PORT_USER2))
+			isakmp_print(gndo, (const u_char *)(up + 1), length, bp2);
 #endif
 		else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT))
 			snmp_print((const u_char *)(up + 1), length);
@@ -653,10 +607,10 @@ udp_print(register const u_char *bp, u_int length,
 #ifdef INET6
 		else if (ISPORT(RIPNG_PORT))
 			ripng_print((const u_char *)(up + 1), length);
-		else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT)) {
-			dhcp6_print((const u_char *)(up + 1), length,
-				sport, dport);
-		}
+		else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT))
+			dhcp6_print((const u_char *)(up + 1), length);
+		else if (ISPORT(BABEL_PORT) || ISPORT(BABEL_PORT_OLD))
+			babel_print((const u_char *)(up + 1), length);
 #endif /*INET6*/
 		/*
 		 * Kludge in test for whiteboard packets.
@@ -674,17 +628,49 @@ udp_print(register const u_char *bp, u_int length,
 			hsrp_print((const u_char *)(up + 1), length);
 		else if (ISPORT(LWRES_PORT))
 			lwres_print((const u_char *)(up + 1), length);
-                else if (ISPORT(LDP_PORT))
+		else if (ISPORT(LDP_PORT))
 			ldp_print((const u_char *)(up + 1), length);
-                else if (ISPORT(MPLS_LSP_PING_PORT))
-			mpls_lsp_ping_print((const u_char *)(up + 1), length);
+		else if (ISPORT(OLSR_PORT))
+			olsr_print((const u_char *)(up + 1), length,
+#if INET6
+					(IP_V(ip) == 6) ? 1 : 0);
+#else
+					0);
+#endif
+		else if (ISPORT(MPLS_LSP_PING_PORT))
+			lspping_print((const u_char *)(up + 1), length);
 		else if (dport == BFD_CONTROL_PORT ||
 			 dport == BFD_ECHO_PORT )
 			bfd_print((const u_char *)(up+1), length, dport);
+                else if (ISPORT(LMP_PORT))
+			lmp_print((const u_char *)(up + 1), length);
+		else if (ISPORT(VQP_PORT))
+			vqp_print((const u_char *)(up + 1), length);
+                else if (ISPORT(SFLOW_PORT))
+                        sflow_print((const u_char *)(up + 1), length);
+	        else if (dport == LWAPP_CONTROL_PORT)
+			lwapp_control_print((const u_char *)(up + 1), length, 1);
+                else if (sport == LWAPP_CONTROL_PORT)
+                        lwapp_control_print((const u_char *)(up + 1), length, 0);
+                else if (ISPORT(LWAPP_DATA_PORT))
+                        lwapp_data_print((const u_char *)(up + 1), length);
+                else if (ISPORT(SIP_PORT))
+			sip_print((const u_char *)(up + 1), length);
+                else if (ISPORT(SYSLOG_PORT))
+			syslog_print((const u_char *)(up + 1), length);
 		else
-			(void)printf("UDP, length: %u",
+			(void)printf("UDP, length %u",
 			    (u_int32_t)(ulen - sizeof(*up)));
 #undef ISPORT
 	} else
-		(void)printf("UDP, length: %u", (u_int32_t)(ulen - sizeof(*up)));
+		(void)printf("UDP, length %u", (u_int32_t)(ulen - sizeof(*up)));
 }
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
+